Have you been programming in Swift for a while and aiming to be better at it? You're at the right place! These tips, if followed wholeheartedly, shall take you a step ahead in Swift Programming.

Feel free to copy and paste the code snippets into Playground. To make it easier for you to understand, I have included several YouTube video links as part of the explanations.

1. For Loop vs. While Loop

Let’s take the below code which prints “Hello” 5 times as an example.

var i = 0
while 5 > i {
print("Hello")
i += 1
}

You initialized the variable “i” and incremented it once after each iteration to ensure that the text is printed the exact number of times you want it to. What if I say you are better without it?

for _ in 1...5 {
print("Hello")
}

The above code does the same task but without any variables.

Rule of Thumb: The greater the number of variables your code has, the higher the chances of code bugs! Never forget the Butterfly effect. It is always better to follow the KISS Methodology (Keep It Simple, Stupid!).

4. Optional Unwrapping

Nested statements can be a nightmare — an endless staircase of complex code! This is where the guard statement comes to the rescue. It can check one or more condition in a single statement, and if any condition is not satisfied, an else block will be called which transfers the control of the program.

5. Generics

Code reusability is the key to be a better programmer. Generics come in handy when avoiding duplication and providing reusable pieces of code. Let’s go through the below code fragments to understand the difference between a redundant code and a code with no duplication.

7. Computed Property vs. Function

The more connected your code is, the lesser typing, typo mistakes, and errors you will have to remedy. If your code has parts which can be interdependent, do not introduce unnecessary mutually exclusive lines of code. Keep it as much connected as possible.

8. Defer

A defer block contains code which will be called only when all the other code in the current scope has ended execution. It “defers” the code execution to a certain point. This is a cleaner approach and helps reduce redundancy.

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